Concrete-road machine



Oct. 4, 1927. 1,644,511

E. G. CARR CONCRETE ROAD MACHINE Filed Dec. 29. 1921 3 Sheets-Sheet l A TTORNEYJ.

Filed Dec. 29. 1921 3 Sheets-Sheet 2 INVENTOR.

BY M, /-A-ee ZJ-U zum A TTORNEYS .'5 Sheets-Sheet 5 E G CARR CONCRETE ROAD MACHINE Filed Dec. 29. 1921 Oct. 4, 1927.-

NVENTOR.

ATTONEYS.

Patented Oct. 4, 1927. I UNITED STATI-:s

t 1,644,511 Pari-NTV oFFlcE.

EDWARD G. CARR, ll CHICAGO, IILINOIS.

CONCRETE-ROAD MACHINE.

Application led December 29, 1921. Serial No. 525,572.

This invention relates to concrete road machines and the object of the invention is to improve the construction and operation of concrete road machines in the manner t0 be hereinafter described and claimed.

Referring to the drawings which accompany this specification and form a part hereof, which drawings illustrate an embodiment of this invention, and on which drawings the same reference characters are employed to designate the same parts wherever they may appear in each of the several views, Fig. 1 is a plan view of a concrete road machine; Fig. 2 is an elevation of the front end of the machine, arts being omitted; Fig. 3 is a vertical, ongitudinal section on the line 3-3 on Fig. 1, looking in the direction indicated by the arrows; Fig. 4 is an elevation of parts of the machine, parts being shown in section; Fig. 5 is a cross section of parts of the machine on the line 5-5 on Fig. 6, looking in the direction indicated by the arrows; and Fig. 6 is a' cross section on the line 6-6 on Fig. 4, looking in the direction indicated by the arrows.

Referring to the drawings, the reference numeral 1 designates a frame which may be constructed in any suitable or preferred manner and which is supported by wheels 2 upon tracks or forms 3. The frame 1 su ports a motor 4 which may be of any suitable or preferred construction, the motor 4 illustrated by the drawings being an ordinary form of gasoline or internal combustion motor or engine, to the shaft 5 of which is rigidly secured a sprocket wheel 6. A countershaft 7 is suitably journaled on the frame 1 and has rigidly secured thereto a sprocket wheel 8, a gear 9 and a second sprocket wheel 10. The sprocket wheels 6 and 8 are connected by a straight sprocket chain 11. A driving shaft 12 is journaled on the frame 1 and is provided with a bevel gear 13, a spiral gear 14, a gear 15, and a sprocket wheel 16, which are all loose thereon but are individually restrained from longitudinal movements with respect to the driving shaft 12. The sprocket wheels l0 and 16 are connected by a straight sprocket chain 17 and the spiral gear 14 is provided with a clutch member 18, the gear 15 is provided with a clutch member 19, and the sprocket wheel 16 is provided with a clutch member 20. A clutch member 21 is splined,

or otherwise suitably secured to the driving Nshaft12 so .as to be rotated thereby while being free, to be moved .longitudinally thereof to clutchthe spiral gear 14 to the drivin shaft 12 or to unclutch it therefrom. clutch 22 is provided with a clutch member` 60 23 to co-act with the clutch member 19 on the gear 15, and a clutch member 24 to coact with the clutch member 2O on the sprocket wheel 16, and this clutch 22 is spllned to the driving shaft 12, or otherwise suitably secured thereto, so as to rotate the same, while being free to be moved longitudinally thereof, and it will be readily seen that a movement of the clutch 22 to the right, see Fig. 1 of the drawings, will clutch the gear 15 to the driving shaft 12, `while a movement of the clutch 22 to the left, will clutch the sprocket wheel 16 to the driving shaft 12. lThe longitudinal movement of the clutch 22 is suiicient so that it can occupy a neutral or stop position without engagmg with either the clutch member 19 or the clutch member 20. The driving shaft 12'is illustrated as provided with universal joints 25 and has at its ends worms which mesh with worm wheels which are rigidly secured to longitudinal shafts 26 and 27. T he longitudina'l shafts 26 and 27 are provided with worms which mesh with worm wheels secured to the wheels 2, and it will bev readily seen that` with the construction thus vfar described, the machine can be ropelled forward or backward, or stopped? by properly positioning the clutch 22 while the motor 4 is in operation.

A flexible float or finisher 28 issecured to "a U-shaped frame 29 which is slidably and rotatably supported by brackets 30 and-31 extending from the frame 1. The U-shaped frame 29, and the ioat or finisher 28, is reciprocated transversely of the road, when turned down upon the road in operative positions, by means of a pin 32 which engages with a slide 33 adapted 4to be reciprocated by a connecting-rod 34 and a crank 35 secured to the longitudinal shaft 26. The U- shaped frame 29, and the float or finisher 28, may be turned up to non-operative positions and the pin 32 disengaged from the slide 35 by such turning operation.

A spreading templet 36 is slidably supported for reciprocation upon a transverse rod 37 which is secured to the angles of bellcrank levers 38 and 39. The short arms of the bell-crank levers 38 and 39 are provided with axle-pins 40 and 41 for wheels 42 and 43 to form an independent supporting frame p Y iiilsulated begrips 51 an l 'for the templetv 36. The spreading tem et 36 ma be pushed forward, or v propell `backwar by bein connected to the frame 1 by links 44 whic may include I in their connections vertical ins 45 and horizontal pins 46 to allow or universal play for running over. small'obstructions,

v track joints for example, and for rounding.

curves. The bell-crank` leversV 38 and 39 l serveas lifting'and lowering means-'for the A Ait) machine. The notched sectors 47 and 48 can be loosely su ported upon the transverse rod 37 and kept-From turning by links 54 and 55 connected to the sectors and to the frame 1 b 'jointed connections which will permit of tile movements permitted by the links 44.

'A clutch 56, Splined to the driving shaft l2,.can lie-operated to clutch the bevel ar 13 to the driving shaft 12 for uncluto it therefrom. The bevel gear 13 meshes with a bevel gear 57 on a shaft 58. The shaft 5 8 is su ported by a bracket 59 at one end, is su p 'ed with, universal joints 60, one of w 'ch is also a sliding joint, and its .other end is supported on a housing 61 which is secured to the" spreading templet 36. The shaft 58 has secured thereto, within the housing 61, an eccentric weight 62 and a spur r 63. A shaft 64', also journaled in the giisin 61, has a like eccentric weight 64 and a e spur gear 65 which is in mesh with the spur gear 63`J The eccentric wei hts 62 and 64 are so set on the shafts that t ey 'both extend in. the same direction horizontall whereby, as they a proach their horisonzal positions, they wil thrust the s read-` ing templet 36' longitudinally but wil balanceeach other, when one is moving up and the other is'moving down, so as not to produce vertical thrusts or movements of the spreading tem let. The springs 66 and 67 act as shock a rhers for the longitudinal lthrusts of the spreading templet 36, whenever the concrete does lnotofl'er suilicient resistance to absorb the kinetic energy of the thrusts produced by the eccentric weights 62 and 64, andlalso tend to center the spreadini"t'iemplet.4

o tampers 68 and 69 are illustrated by the drawings as laced parallel and arranged in anon-paralle relation with respect to the ,spreadin tem let 36 and the ioat or nisher 28. A s ft 0 extends parallel with the tampers 6 8 and 69 and has a spiral ear 71 fast thereon to rotate the shaft 70 w en the l spiral gear 14 is clutched to the driving shaft 12. 'The has 705s provided with uni. versal and sliding'joints 72 and has bevel ears 73. and 74 which are connected with ike sides of bevel gears 75 and 76 secured to shafts 77 and 78, so as to rotate shafts 77 and 78 in the same direction. The shafts 77 and 78 are each provided with oppositely disposed cranks 79 and 80, that is cranks on the shafts -180 degrees apart, and the cranks for a single tamper extend in the samedirection so t at the'motion of an point in a tamper would be ina circle. 'h are provided with still springs 81 and boxes 82 secured to the springs 81 are journal boxestosuspend the tampers from the cranks 79 and 8O at each end. The shafts 77 and 78 are hung from links 83 which are pivoted to bell-crank levers 84 and 85 which are pivoted tothe frame 1 so that the 'tain rs 68 and 69 can be raised away from or owered towards the concrete. The dilerent positions'which may be assumed by the shafts 77 and 78 isthe reason for the universal and 'sliding joints in the shaft 70. The bearings for the shaft l70 preclude longitudinal movements of the tampers 68and 69, except, of course, assuch longitudinal movements are effected by the rotation ofthe cranks 79 and 80.

' Thebell-crank levers 84 and 85 may be connected by da 'link 86 for simultaneous movement so that both ends of the 'tampers 68 and 69 may be raised or lowered simultaneously. One of the bell-crank levers, 84 for example, may have along arm to serve as an operating ever and be provided with a spring pressed detent 87 and a grip 88.

e tampers The detent 87 can be engagedwith a notch' in a notched-sector 89 secured to the frame of the machine so that the tampers can'be held indifferent vertical positions.

vious from the foregoing description as to its propulsion, the operation of the motion transmittin mechanism, the clutches or clutch mem rs, the spreading templet and the float or finisher,but the rinciple of operation of the tampers requires further explanation. A oint in a tamper moves in a vertical circle in the plane of the tamper, except as the springs 81 may be deflected or ben-t. The motor 4 turns over in such a direction that, when the machine is moving forward, spreading templet leading, the tampers are moving at the'bottoms of their circular motions towards their leading ends, or towards the observers left hand when -looking at Fig. 1 of the drawings. When The operation ofthe machine will beA ob-V los` general direction of movement of the machine so that there is a longitudinal rubbing action of the tampers upon the concrete as well as the forward movements of the tampers as a whole due to the forward movement of the machine and, these movements being in the same general direction, the tendency to remove excess material from high places and lill up depressions is intensified in addition to the vertical effect of the tampers.

The non-parallel relation of the members which work upon the concrete is of advantage for the following reasons. The straightacross-the-road spreading templet is liable t0 leave waves especially at the joints of tracks when care has not been exercised to properly support and even up the joints. If the tamper, or tampers, were parallel with such waves, the wave form would remain to a greater or less extent, depending upon the consistency of the concrete. Such waves in a road are called corduroy and are highly objectionable as both wheels of a vehicle strike them at the same time. By arranging a tamper obliquely to the spreading templet, the corduroy effect can be practically eliminated by careful manipulation of the machine, and, if the machine be carelessly manipulated, the corduroy effects may be transformed into waves runningdiagonally across the road and will be less objectionable because both wheels of a vehicle will not hit the same corduroy at the same time. While the float or finisher 28 is not capable of any very severe action on the concrete, it can and will smooth the cement mortar fairly well even though it be left' pretty rough by the tampers, and, as its motion is obliquely across the waves, it can more effectively produce a uniformly smooth surface than as though it reciprocated in parallelism with the waves.

T e reference numeral 90, on Fig. 3 of the drawings, designates a shifting lever for the clutch 22.

What is claimed is:

1. The combination in a concrete road machine, of a spreading templet, and a vertically reciprocatable tamper arran d in nonparallel relation to each other, an means for reciprocating the tamper vertically.

2. The combination in a concrete road machine, of a vertically reciprocatable tam er, a oat lfollowing the tamper and arranged in non-parallel relation to the tamper, and melzlns for reciprocating the tamper vertica 3.yThe combination in a concrete road machine, of a spreadin templet, and a float arranged substantial y parallel with each other', a tamper between the spreading templet and the float and arrangedat an angle with respect to them, and means for operating the tamper.

4. In a concrete road machine, the combination of a tamper, of means for moving the tamper both vertically and lon itudinally of itself, said means being adapte to move the tamper longitudinally of itself while in contact with the concrete.

5. In a concrete road machine, the combination with a tamper, of means for moving any point in 'the tamper in a circle in the vertical plane of the tamper.

6. In a concrete road machine, the combination with a frame, of a tamper carried thereby and movable therewith, means to propel the frame, and means for operating the tamper vertically and to cause the tamper to be moved longitudinally of itself, in a direction at an angle to the movement of the frame while the tamper is in contact with the concrete.

7. In a concrete road machine, the combination with a frame adapted to be propelled in oposite directions, of a tamper carrled by the frame and so disposed with respect to the frame that one end of the tamper will be in advance of the other end of the tamper whatever may be the direction of movement of the frame, means for elevating and depressing the tamper and moving it longitudinally of itself so that it will be moved longitudinally of itself while in contact with the concrete, and means for changing the direction of the longitudinal movement of the tamper, while in contact with the concrete, when the direction of movement of the frame is changed, so that the movement of the tamper, longitudinally of itself, while in contact with the concrete, will be in the same general direction as the movement of the frame.

8. In a concrete road machine, the combination with a movable frame, of an obliquely arranged vertically movable tamper carried thereby, means to propel the frame in opposite directions, means to move the tam er longitudinally of itself when in contact with the concrete, and adapted to change the longitudinal direction of movement of theA tamper, while in contact with the concrete,

when the direction of movement of the frame is changed. 9. In a concreteroad machine, the combination with a frame, of means for propelling the frame, and a spreading templet supporte independently of the frame but adapted to be ropelled thereby.

n witness whereof I hereto ailix my signature.

EDWARD'G. CARR. 

